Author: Christophe Theron
Date: 10:53:13 06/21/00
Go up one level in this thread
On June 21, 2000 at 08:30:59, Enrique Irazoqui wrote:
>[D]1r6/1pb1k1p1/4p2p/1p1p4/3Pp2P/1R2P1PB/1P2P1K1/8 b - - 0 1
>
>Yesterday I looked at this position that reveals once again how much trouble
>programs have in recognizing the importance of blocked pieces. Some programs
>pick and drop 1...b4, but none of them realize that the blocked rook is out of
>the game until the search makes them see the consequences many hours later. The
>evaluation at the initial position or after 1...b4 2.Rxb4 b5 3.Rb3 b4 is almost
>the same. It takes 61 minutes for F6a and 335 minutes for Tiger to pick b4, and
>much, much longer to fail high.
Well, life is unfair. I do have something for this kind of positions in Tiger.
Normally Tiger is able to suspect that the rook is in trouble.
However, for an unknown reason, it looks like it does not work in this here...
Sometimes I wonder if adding this kind of knowledge is worth the trouble, as
there are so many exceptions, and even cases where the knowledge is counter
productive, or is not triggered at the right time!
Christophe
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